内容正文:
Unit 9 It’s important to have good habits.
Ⅰ.Section A 课文精讲
1.I think it’s important for teenagers to talk problems over with someone.
我认为对于青少年来说和别人商讨问题是重要的。
该句中it是形式主语,真正的主语是to talk problems over with someone,动词不定式的逻辑主语由for引导。it作形式主语时常用于以下两种结构:
· It’s+adj.+for sb.+(not) to do sth.
如果前面的形容词是描述不定式这一动作,通常用for引出逻辑主语,
例:easy,hard,difficult,interesting,impossible,necessary,important
· It’s+adj.+of sb.+(not) to do sth.
如果前面的形容词是描述不定式动作的执行者的品质,则用of 引出。
例:good,kind,nice,clever,foolish,right,brave
例题:It’s necessary you to get along well your classmates.
A.of;with
B.for;with
C.of;to
D.for;to
2.Exercising helps teenagers to stay healthy.锻炼帮助青少年保持健康。
(1)exercising是动名词,在句中作主语。
在一般现在时中,当动名词、动名词短语、动词不定式或宾语从句等作主语时,其谓语动词用单数。
(2)句中stay healthy与keep fit 同义。
stay意为“保持”,和keep同义;stay还可表示“待在某地”。
例题:
①保持健康很重要。 is very important.
②I’m going to help my mom (clean) the house.
3.In order to be healthy,teenagers need to get enough sleep.
为了保持健康,青少年需要得到足够的睡眠。
(1)in order to do sth. 为介词短语,表目的,意为“为了做某事”;
其否定形式为in order not to do sth.,意为“为了不做某事”。
(2)enough sleep 意为“充足的睡眠”,enough意为“足够的;足够地”,
修饰n.时,放在名词前后都可;修饰adj.或adv.时,放在所修饰词之后。
例题:①Jim is studying harder get into a better university.
A.in order that
B.in order to
C.so that
D.as soon as
②这房子对我们来说不够大。The house for us.
4.They know it is never too late to change bad habits.
他们知道改变坏习惯从来不会太晚。
It’s never too late to do sth. 意为“做某事从来不晚”。
too...to...句型可以转化为not... enough to...和so/such..that...句型,此时that 从句为否定结构。
例:He is too young to do the work.
→He is so young that he can’t do the work.
→He is not old enough to do the work. 他太年轻了,不能做这项工作。
例题:①他太矮了,够不着树上的苹果。
He is the apples on the tree.
②活到老,学到老。 It is learn.
5.However, Wang Le’s parents trust her because she tells them her problems.
然而,王乐的父母相信她,因为她会把自己的问题告诉父母。
trust 动词,意为“信任,信赖”;
辨析:trust,believe与 believe in
· trust后面接表示人的名词或代词,指相